Flat sheet delivery for web printing rotary presses



March 8, 1938. 2,110,586

FLAT SHEET DELIVERY FOR WEB rnxmme ROTARY PRESSES H. M. BARBER Filed June 25. 1936 INVENTOR ATTORNEYS Patented Mar. 8, 193 8 I UNITED STATES PATENT OFFICE,

FLAT SHEET DELIVERY FOR WEB PRINT ING ROTARY PBESSES Howard M. Barber, lawcatuck, ,Conn., 'assignor to O. B. Gottrell & Sons Company, Westerly, R. I., a. corporatlon'of Delaware Application June 25, 1936, Serial No. 87,155;

' a Claims. (01. 271::6)

In high speed web printing rotary presses having flat sheet deliveries it is desirable that the speed of the sheets be materially reduced on their way to the delivery piles, Ihave found that by providing stationary supports over which the sheets are drawn as they are forwarded from the sheet collecting rotary carriers to the oppositely disposed sheet delivery endless carriers, the sheet transfer rotary carriers maybe driven at the same high surface speed as the sheet collecting rotary carriers and that the endless sheet delivery carriers may be driven at a slower surface speed, it being understood that the higher surface speed of the sheet transfer rotary carriers will not aflzect the sheets after their leading ends have been taken by the sheet delivery endf less carrier grippers because the sheets are being drawn over the said stationary supports by the slower moving sheet delivery endless carrier A practical embodiment of my invention is represented in the accompanying drawing, in which the figure represents a diagrammatic side elevation of a double flat sheet delivery.

The traveling-web I is led through the coacting rotary cutters 2, 3, the guides 4, 5, the rolls 6,1, and the guides 8,--9 to a point between the sheet collecting rotary carriers III, II. Single sets of grippers I2 and I3 on the sheet collecting rotary carriers l0 and II respectively, collect alternate sheets cut from the travelingweb. In the present instance the sheets are-collected in groups of two. These sheet collecting rotary carriers are driven ata surface speed equal to the speed of travel of the web, by any well known or approved means .(not shown herein).

The sheet transfer rotary carriers l4, ii are driven at the surface speed of the sheet -,c0l1ect- I t ink rotary carriers "I, II, as for instance through the-pairs of gears-l6, l1 and l8, 19 respectively. These sheet transfer rotary carriers are shown herein as having twice the circumference of the sheet collecting rotary carriers and as being pro--.

vidd with single sets of grippers 20, 2|, arranged 4,5 to coact with the single sets'of grippers l2, l3 on the sheet collecting-rctary carriers I, II, to

take a collected-group of sheets from the said rotary carrier grippers 20 and 2| respectively. 5

Because the surface speed of the sheet delivery endless carriers is less than the surface speed of. the sheet collecting and transfer carriers, I provide curved stationary supports 34, 35 over which the groups ofsheets travel as they are forwarded 10 by the sheet transfer rotary carrier grippers 20 and 2| from the sheet collecting rotary carrier grippers l2 and I3 to the sheet delivery endless carrier grippers 32 and 33. This permits the sheet transfer rotary carriers l4, l5 to travel at 16 the same surface speed as the sheet collecting rotary carriers in, II without disturbing the slower travel of the groups of sheets after their leading ends have been taken by the sets of grippers 32, 33 on the slower moving sheet de; 20 livery endless carriers 22 and 23, 4,

The means which Ihave shown for taking the sheets from. the sheet delivery-endless carrier and depositing them flat onto the piles 36, 31 are shown herein as sheet tail end engaging mecha- 25 nisms ,38 and 39 respectively, of. well known or approved form, such for instance as the mechanism disclosed in my copending application filed May 20, 1936, Serial No. 80,667, each of which mechanisms comprises, generally, coacting rotary 30 and oscillating nippers 40, ll driven fromthe sheet delivery, endless carrier and operable to depress the tail ends of the sheets, retard, and stop the sheets and deposit them onto their delivery pile. 35

From the above description it will be seen that by, providing thecurved stationary supports which partially surround the sheet transfer carriers the collected groups of sheets are drawn along the supportsfirst at the speed of the web, 40

by the transfer carrier grippers and then at a lesser speed by the delivery carrier grippers, thereby allowing the transfer carriers to travel at'the surface speed of the, sheet collecting carriers and yet permit the groups of sheets to be rangement of the several .partswithout departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described, but

What I claim is:

1. Means for cutting sheets from a traveling web, and, a double flat sheet delivery therefor comprising two rotary carriers, each arranged to collect a group of sheets, two oppositely disposed sheet delivery carriers, two rotary carriers for transferring the collected groups of sheets from their respective sheet collecting carriers to their respective sheet delivery carriers, and curved stationary sheet supports along the convex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides of their respective transfer carriers and located between them and their sheet collecting and delivery carriers.

2. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two rotary carriers, each arranged to collect a group of sheets, two oppositely disposed sheet delivery endless carriers, two rotary carriers for transferring the collected groups of sheets from their respective sheet collecting carriers to their respective sheet delivery endless carriers, and curved stationary sheet supports along the convex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides of their respective transfer carriers and located between them and their sheet collecting and delivery carriers.

3. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two rotary carriers, each arranged to collect a group of sheets, two oppositely disposed sheet delivery carriers, two rotary carriers for transferring the collected groups of sheets from their respective sheet collecting carriers to their respective sheet delivery carriers, and curved stationary sheet supports along the convex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides' of their respective transfer carriers and located between them and their sheet collecting and delivery carriers, means for driving the sheet collecting and transfer carriers at the surface speed of the web and the sheet delivery carriers at a lesser surface speed.

4. Means for cutting sheets from a travelingweb, and adouble flat sheet delivery therefor comprising two rotary carriers, each arranged to collect a group of sheets, two oppositely disposed sheet delivery endless carriers, two rotary carriers for transferring the collected groups of sheets from their respective sheet collecting carriers to their respective sheet delivery endless carriers, and curved stationary sheet supports transfer carriers at the surface speed of the web and the sheet delivery carriers at a lesser surface speed. i

5. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two rotary carriers, each having a single set of grippers arranged to collect a group of sheets, two sheet delivery carriers havingspaced sets of grippers, two rotary carriers having single sets of grippers for transferring the collected groups of sheets from their respective sheet collecting carrier grippers to their respective sheet delivery carrier grippers, and curved stationary sheet supports along the convex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides of their respective transfer cylinders and located between them and their sheet collecting and delivery carriers.

6. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two.rotary carriers, each having a single set. of grippers arranged to collect a group of sheets, two sheet delivery endless carriers having spaced sets of grippers, two rotary carriers having single sets of grippers for transferring the collected groups of sheets from their respective sheet collecting carrier grippers to their respective sheet delivery endless carrier grippers, and curved stationary sheet supports along the convex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides of their respective transfer cylinders and located between them and their sheet collecting and delivery carriers.

7. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two rotary carriers, each having a single set of grippers arranged to' collect a group of sheets, two sheet delivery carriers having spaced sets of grippers, two rotary carriers havwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding.

the upper sides of their respective transfer cylinders and locatedbetween them and their sheet collecting and delivery carriers, means for driving the sheet collecting and transfer carrier grippers at the surface speed of the web and the sheet delivery carrier grippers at a lesser surface speed.

8. Means for cutting sheets from a traveling web, and a double flat sheet delivery therefor comprising two rotary carriers, each having a single set of grippers arranged to collect a group of sheets, two sheet delivery endless carriers having spaced sets of grippers, two rotary carriers having single sets of grippers for transferring the collected groups of sheets from their respective sheet collecting carrier, grippers to their respective sheet delivery endless carrier grippers, and curved stationary sheet supports along the con-' vex sides of which the sheets are drawn as they are forwarded by the sheet transfer and delivery carriers, said sheet supports partially surrounding the upper sides of their respective transfer cylinders and located between them and their sheet collecting and delivery carriers, means for driving the sheet collecting and transfer carrier grippers at the surface speed of the web and the sheet delivery carrier grippers at a lesser surface speed.

u HOWARD M. BARBER. 

